1. Acceptance of Terms

By accessing or using Riichi Sensei, you acknowledge that you have read, understood, and agree to be bound by these Terms of Service and our Privacy Policy. If you do not agree to these terms, please do not use our app.

We may update these terms from time to time. Your continued use of the app after any changes constitutes acceptance of the new terms.

2. Description of Service

Riichi Sensei is an educational mobile application designed to teach Riichi Mahjong rules, scoring, and strategy. The app includes:

• Comprehensive Yaku Encyclopedia with detailed explanations
• Interactive learning modules and practice exercises
• Hand calculator for scoring calculations
• Educational content about Riichi Mahjong rules and strategy
• Multi-language support for enhanced learning

3. License and Usage Rights

Grant of License

We grant you a limited, non-exclusive, non-transferable, revocable license to use Riichi Sensei for your personal, non-commercial use in accordance with these terms.

Restrictions

You may not:

• Copy, modify, distribute, sell, or lease any part of the app
• Reverse engineer or attempt to extract the source code
• Remove or alter any copyright, trademark, or other proprietary notices
• Use the app for any commercial purpose without written permission
• Create derivative works based on the app

4. User Conduct

When using Riichi Sensei, you agree to:

• Use the app only for lawful purposes and in accordance with these terms
• Not interfere with or disrupt the app's functionality
• Not attempt to gain unauthorized access to any part of the app
• Respect the educational nature and purpose of the content
• Report any bugs or issues through appropriate channels

5. Intellectual Property

Our Content

All content in Riichi Sensei, including but not limited to text, graphics, logos, icons, images, and software, is the property of Riichi Sensei or its licensors and is protected by copyright and other intellectual property laws.

Mahjong Rules and Terminology

While traditional Riichi Mahjong rules and terminology are part of public domain, our specific explanations, examples, and educational content are original works protected by copyright.

Trademarks

"Riichi Sensei" and associated logos are trademarks. You may not use these trademarks without our prior written consent.

6. Educational Content Disclaimer

For official tournament play, please consult the relevant governing bodies and official rulebooks. We recommend verifying critical information with authoritative sources such as Riichi Wiki or official tournament organizations.

7. Privacy and Data Protection

Your privacy is important to us. Our collection and use of information is governed by our Privacy Policy, which is incorporated into these terms by reference. Please review our Privacy Policy to understand our practices.

Key privacy highlights:

• We collect minimal, anonymous usage data for app improvement
• No personal information is collected or stored
• You can opt-out of analytics at any time
• All data practices comply with GDPR and other privacy regulations

8. App Availability and Updates

Service Availability

We strive to keep Riichi Sensei available at all times, but we do not guarantee uninterrupted access. The app may be temporarily unavailable due to maintenance, updates, or circumstances beyond our control.

Updates and Changes

We may release updates to improve functionality, add features, or fix issues. Some updates may be required for continued use of the app. We may also modify or discontinue features with reasonable notice.

9. Limitation of Liability

To the maximum extent permitted by law, Riichi Sensei and its developers shall not be liable for any indirect, incidental, special, consequential, or punitive damages, or any loss of profits or revenues, whether incurred directly or indirectly.

Our total liability for any claims arising from your use of the app shall not exceed the amount you paid for the app (which is currently free).

10. Disclaimer of Warranties

Riichi Sensei is provided "as is" without warranties of any kind. We do not warrant that:

• The app will meet your specific requirements
• The app will be uninterrupted, timely, secure, or error-free
• The results obtained from using the app will be accurate or reliable
• Any errors in the app will be corrected

11. Termination

These terms are effective until terminated. You may terminate your use of the app at any time by deleting it from your device. We may terminate or suspend your access immediately, without prior notice, if you breach these terms.

Upon termination, your right to use the app ceases immediately, and you must delete all copies from your devices.

12. Governing Law

These Terms of Service are governed by and construed in accordance with applicable local laws. Any disputes arising from these terms or your use of the app will be resolved through appropriate legal channels in the jurisdiction where our company is based.

13. Contact Information

If you have any questions about these Terms of Service, please contact us: